A small sidebar: Around the time that Vito states his opposition to the drug traffic, we see Tattaglia speaking to his aid. Of course, we don't know what he told him, but I wonder why FFC placed that scene in the movie?
Maybe Tatt was afraid to show his hand that it was Barzini running the show and he was asking his aide how to handle the situation.
"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"
